New design for the ANTARES-II facility for neutron imaging at FRM II

The advanced neutron tomography and radiography experimental system (ANTARES) facility for neutron imaging is successfully operating at the FRM II reactor of Technische Universität München. In 2009, a redistribution of beam positions at FRM II will require a rebuilding of ANTARES at a different position. In May 2006, the DIDO reactor FRJ-2 at the research center in Jülich has been permanently shut down. The Jülich Center for Neutron Scattering has been founded, and 8 instruments are currently being transferred to FRM II in Munich, where a new experimental hall has been built at the east side of FRM II. The neutron beam SR4b currently hosting ANTARES is the only beam with a cold spectrum that can be extended from the experimental hall of FRM II to the new east hall. ANTARES will have to move to the second channel (SR4a) of the beam tube SR4. Due to the different geometry in relation to the reactor walls, a complete rebuilding of ANTARES is required, including a new shielding concept with lighter materials to meet the restrictions of the permitted floor load together with the new beam line SR4b to the east hall. The complete reconstruction allows the incorporation of several improvements.